MEASUREMENT AND PREDICTION OF SOUND INBOARD AND OUTBOARD OF SHIPS AS GENERATED BY CAVITATING PROPELLERS
A survey is presented in which manner the noise, generated by a cavitating ship propeller, can be predicted based on either full scale or model scale experiments. Two sides of the problem are elucidated, i.e. the noise radiated from the propeller into the water and the noise inside the ship. For solving the first problem the model technique as used in the depressurized towing tank of the NSMB offers fruitful possibilities. Model rules for the noise-spectrum are given. Also the measuring set-up in this tank is outlined, together with some acoustical considerations about the acoustical properties of the tank. The second part of the paper concerns the problem of noise aboard ships. Most attention is paid to the description of the cavitating propeller as a source of sound. A new measuring technique for the measurement of the acoustical source strength of a propeller is outlined. Emphasis is given on the relation between the vibration problem and the noise problem aboard ships and on the possibilities of the depressurized towing tank in relation to these problems.
- Symposium on High Powered Propulsion of Large Ships, Part 2, December 10-13, 1974, Wageningen, Netherlands. Entire proceedings-2 volumes, 26 papers-available for $21.00.
Netherlands Ship Model BasinHaagsteed 2, P.O. Box 28
- De Bruijn, A
- TEN WOLDE, T
- Publication Date: 1974-12
- Features: References;
- Pagination: 31 p.
- TRT Terms: Cavitation (Mechanics); Cavitation erosion; Cavitation noise; Measurement; Noise; Propellers
- Uncontrolled Terms: Noise measurement
- Subject Areas: Environment; Marine Transportation; Vehicles and Equipment;
- Accession Number: 00128938
- Record Type: Publication
- Source Agency: Netherlands Ship Model Basin
- Report/Paper Numbers: No. 490
- Files: TRIS
- Created Date: Feb 4 1976 12:00AM